★17.对话框

AlertDialog.Builder

Dialog d = new AlertDialog.Builder(getActivity())
        .setView(/* View */)
        .setTitle(/* String */)
        .setPositiveButton(android.R.string.ok, (dialog, which) -> {
            // do something
        })
        .setNegativeButton(android.R.string.cancel, (dialog, which) -> {
            // do something
        })
        .create();

DialogFragment

创建

public class DatePickerFragment extends DialogFragment {
    public static final String EXTRA_DATE = "com.bignerdranch.android.criminalintent.date";
    private static final String ARG_DATE = "date";

    // 创建Fragment实例，接受Date参数为初始化要素
    public static DatePickerFragment newInstance(Date date) {
        Bundle args = new Bundle();
        args.putSerializable(ARG_DATE, date);
        DatePickerFragment fragment = new DatePickerFragment();
        fragment.setArguments(args);
        return fragment;
    }

    // 创建对话框
    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new AlertDialog.Builder(getActivity())
                .setView(/* View */)
                .setTitle(/* String */)
                .setPositiveButton(android.R.string.ok, (dialog, which) -> {
                    // do something
                })
                .setNegativeButton(android.R.string.cancel, (dialog, which) -> {
                    // do something
                })
                .create();
    }
}

显示

FragmentManager manager = getFragmentManager();
DatePickerFragment dialog = DatePickerFragment.newInstance(/* 数据 */);
dialog.setTargetFragment(/* 目标Fragment */, /* 标签 */);
dialog.show(manager, DIALOG_DATE);

Dialog

• 【Todo】

注意事项

• 使用AppCompat兼容库版本的DialogFragment和AlertDialog能获得长期的支持。
• 使用DialogFragment来管理对话框，可以更灵活地显示对话框。设备配置改变时，直接使用对话框也会使数据丢失。

实用第三方库

• 直接拿去用！几种常见Dialog，懒人必收